Why does my car fan keep running after I shut it off?
It is so the car won’t heat soak and blow coolant out the pressure release. Your habit of pulling the fuse may have arced the contacts on the fan relay causing it to weld itself open. Replacing that relay should fix it but it still may run the fan after you shut the car off.
What to do when your electric heater won’t turn off?
If you are sure that the batteries are working, or if your thermostat has a direct connection to your home’s electric, then turn the thermostat’s setting to off. Give your system a bit and see if it shuts down. If after 3 or so minutes your system is still running then you may need to cut the power to the whole heating system.
What should I do if my radiator fan stops running?
If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. If the fan stops running, replace that sensor. If the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the glove box.
How does the radiator fan on a car work?
The radiator fan module has a ten minute timer in it that allows the fan to come on if one of the temp sensors detects a coolant temp over a specified temperature. This is when you shut off the car and the fan stops, but a minute later is starts up again.
What to do if car heater is not working?
Check the heater core temperature. Lift the hood and check the temperature around where the heater core hoses enter the heater core box. The safest way to do this is with a non-contact infrared thermometer. If one hose is the same temperature as the coolant and the other hose is cold, there may be a blockage in the heater core.
What can cause a car heater to not work?
– Low coolant – A blockage in the heater core – A stuck blend door – A stuck heater valve – A bad switch or linkage
What to check first if your heater isn’t working?
- off switch that is frustratingly easy to switch off by mistake.
- Look at Your Fuse Box That Powers Your Heater.
- Check the Batteries in Your Thermostat.
- Replace the Air Filters.
- Notice Any Odors.
- Heater Isn’t Working?
What can cause a heater fan to stop working?
- About Car Heater Fans. A bit of background on the working of car heater fans will be helpful in diagnosing the source of the problem.
- Prime Causes of Care Heater Fan Failure.
- ACCS (Automatic Climate Control System) Problem.
- Dysfunctional Motor.
- Blown Fuse or Loose Wiring.